:00:00. > :00:08.Leah here today with your top stories, including some of this:
:00:09. > :00:13.The boat launched from America that washed up in Wales.
:00:14. > :00:24.And the robot that's killing weeds on a farm in Yorkshire.
:00:25. > :00:29.The world's biggest catapult fires again.
:00:30. > :00:31.But first, Ant and Dec will be presenting tonight's Brit awards
:00:32. > :00:34.in London where Adele's expected to the win the top prize -
:00:35. > :00:38.She is also in the running for best British female.
:00:39. > :00:40.Coldplay could make history if they win Best Group -
:00:41. > :00:45.One Direction are also up for Best Group and Video of the Year
:00:46. > :00:49.Justin Bieber, Rihanna and Little Mix are expected
:00:50. > :00:55.And Martin will be there on the red carpet at 4.20pm this afternoon.
:00:56. > :00:58.He'll be with fans waiting to catch a glimpse of the stars,
:00:59. > :01:07.How did this small wooden boat end up on a beach in Wales?
:01:08. > :01:09.Well, it washed up after travelling nearly 4000 miles at sea.
:01:10. > :01:16.A mysterious boat washes up on a beach in Wales.
:01:17. > :01:21.There is no one on it, so where did it come from?
:01:22. > :01:23.It's called the Carolina Dreamer and it's been at sea
:01:24. > :01:28.At the beginning of February, these children, along
:01:29. > :01:31.with their mum, spotted it floating towards them.
:01:32. > :01:33.William was so excited, shouting there's a boat,
:01:34. > :01:38.So I went in and pulled it out to get a better look.
:01:39. > :01:40.Now covered in barnacles, the boat crossed the Atlantic
:01:41. > :01:46.She discovered it had been launched by children at a school
:01:47. > :01:49.in Charleston, in South Carolina in the United States.
:01:50. > :01:52.I'm so happy for the children that were involved,
:01:53. > :01:55.because they were just waiting desperately for news.
:01:56. > :01:58.We've just had some lovely messages from them, really excited to hear
:01:59. > :02:03.The schoolkids attached a tracking device to the boat and followed
:02:04. > :02:07.the Carolina Dreamer on its 4000-mile journey.
:02:08. > :02:11.It set off from the South Carolina coast in May last year.
:02:12. > :02:16.It first landed on a beach a week later on the island of Bermuda.
:02:17. > :02:19.It then relaunched on its way across the Atlantic,
:02:20. > :02:24.around Ireland, and eventually into Cardigan Bay, Wales.
:02:25. > :02:27.The school lost contact with it around ten miles to the north west
:02:28. > :02:32.of Aberystwyth, unaware it had been found on the beach.
:02:33. > :02:34.When they found out it had been rescued, they couldn't believe
:02:35. > :02:38.the Carolina Dreamer was still alive.
:02:39. > :02:42.I was really excited that someone found our boat and that we don't
:02:43. > :02:46.have to worry about contacting people about it any more.
:02:47. > :02:52.Helen's already taken the boat to a children's school in Wales.
:02:53. > :02:55.They hope to relaunch the Carolina Dreamer back
:02:56. > :03:02.Now to the massive fire-throwing catapult that's back in action
:03:03. > :03:05.after being repaired at Warwick Castle in England.
:03:06. > :03:08.It's the largest missile launcher of its kind in the world
:03:09. > :03:10.and we were there to catch all the action.
:03:11. > :03:19.It's made of wood. It's got a big wheel and a stick.
:03:20. > :03:26.And it launches, like, big balls that are on fire.
:03:27. > :03:29.Allow me to introduce you to the world's largest seize
:03:30. > :03:36.engine, a huge catapult called a trebuchet.
:03:37. > :03:39.Our machine is called Ursula, the bear.
:03:40. > :03:41.She is designed to destory castles, towns and villages.
:03:42. > :03:46.She stands at 18 metres tall and she weighs 22 tonnes.
:03:47. > :03:50.The shots we launch from our machine would weigh around 150 kilograms.
:03:51. > :03:57.Imagine two huge washing machines being thrown at you at 140mph.
:03:58. > :04:00.This machine has to fire every six minutes, so my men must run up these
:04:01. > :04:04.If the sun is pouring through the slats of the wheels
:04:05. > :04:07.and they're looking at it, they're going to get dizzy.
:04:08. > :04:10.And if they get sick, well, what comes out
:04:11. > :04:33.A farmer's son from South Yorkshire has developed a robot that can find
:04:34. > :04:38.weeds in crop fields and spray them with weed killer.
:04:39. > :04:41.It has two cameras and a Sat-Nav to find its way around and he's been
:04:42. > :04:46.trying it out on his dad's farm near Stocksbridge.
:04:47. > :04:58.That's all from me. I'm back in half an hour with more.
:04:59. > :05:03.Join us then. I will see you very soon.